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Publikováno v:
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 157:182-185
White virgules, commas, and dot designs on tricolored ceramics are sporadically found in different archaeological sites located in Northwestern Argentina area, as Puna and Quebrada de Humahuaca. This decorating style has been reported in several arti
Publikováno v:
Journal of Low Temperature Physics. 135:111-114
We report a low temperature magnetic study on the phase separated polycrystalline manganites La0.5Ca0.5Mn1−y Fe y O3 (0.02≤y≤0.06). Several abrupt and sizeable magnetization steps are observed in the M(H) curves of all samples at 2 K, which are
Autor:
G. Polla, P. Levy, M.C. Terzzoli, Ricardo R. Urbano, F. Parisi, Diego Rubi, G. Leyva, S. Duhalde
Publikováno v:
Physica B: Condensed Matter. 320:86-89
Thin films of perovskite manganite, with nominal composition La0.5Ca0.5MnO3, have been prepared by pulsed laser deposition on (1 0 0) SrTiO3, (1 0 0) LaAlO3, (1 0 0) Si and YSZ/CeO2-buffered (1 0 0) Si substrates. Structural and electrical characteri
Publikováno v:
Hyperfine Interactions. :447-453
Transmission Mossbauer Spectroscopy (TMS) and Conversion Electron Mossbauer Spectroscopy (CEMS), together with X-ray diffraction (XRD) are applied to identify the origin of stain defects formed on one-side zinc-coated steel used in the automotive ind
Autor:
F. Parisi, G. Polla, D. Vega, H. Lanza, Pablo Levy, Luis Ghivelder, Rafael S. Freitas, G. Leyva
Publikováno v:
Physical Review B. 62:6437-6441
A systematic study of phase separation effects in polycrystalline La_0.5 Ca_0.5 Mn O_3 obtained under different thermal treatments is reported. Samples with average grain size ranging from 200 to 1300 nm were studied. Magnetic and electrical measurem
Publikováno v:
Solid State Ionics. 116:139-143
We report the synthesis of YBa 2 Cu 3 O 7−δ (Y-123 phase)-single crystals, through a different path to the traditional one – which involves Y 2 BaCuO 5 (Y-211 phase) as a precursor –. In our case, at 970°C a Pt compound appears: Y 2 Ba 3 Cu 2
Publikováno v:
Solid State Ionics. 99:251-256
Single crystals of Bi 2 Sr 2 CaCu 2 O x have been grown by directional solidification method in order to analyze annealing effects on critical superconducting temperature ( T c ) by AC susceptibility measurements. Structural modifications were studie
Publikováno v:
Plant and Soil. 164:177-185
A Uruguayan rhizobia collection (67 isolates) obtained from nodules of Medicago sativa, Melilotus albus, Medicago polymorpha, Trifolium subterraneum, Trifolium repens, Trifolium vesiculosum, Lotus corniculatus, Lotus subbiflorus, Lotus pedunculatus,